diff --git a/IPython/html/static/notebook/js/outputarea.js b/IPython/html/static/notebook/js/outputarea.js
index 84372f7..45ee860 100644
--- a/IPython/html/static/notebook/js/outputarea.js
+++ b/IPython/html/static/notebook/js/outputarea.js
@@ -421,7 +421,7 @@ var IPython = (function (IPython) {
this.append_mime_type(json, toinsert);
this._safe_append(toinsert);
// If we just output latex, typeset it.
- if ((json.latex !== undefined) || (json.html !== undefined)) {
+ if ((json['text/latex'] !== undefined) || (json['text/html'] !== undefined)) {
this.typeset();
}
};
@@ -484,7 +484,7 @@ var IPython = (function (IPython) {
if (this.append_mime_type(json, toinsert)) {
this._safe_append(toinsert);
// If we just output latex, typeset it.
- if ( (json.latex !== undefined) || (json.html !== undefined) ) {
+ if ((json['text/latex'] !== undefined) || (json['text/html'] !== undefined)) {
this.typeset();
}
}